Rotary toothbrush



G.l B. EHmG. ROTARY TOOTHBRUSH.

APPLICATION FILED OCT. 2,1919.

1,340,760. Patented May 18, 1920.

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GEORGE B. EHRIG, Ol'Y WASHINGTON, DISTRICT Oil1 COLUMBIA.

ROTARY TOOTI-IBRUSI-I.

Specification of Letters Patent.

Patented May 18, 1920.

Application filed October 2, 1319. Serial No. 327,846.

To all whom t may concern:

Be it known thatl, GEORGE B. Ennio, a citizen of the United States,residing at Vashington, in the District of Columbia, have invented newand useful Improvements in Rotary Toothbrushes, of which the followingis a specification.

This invention relates to improvements in rotary tooth brushes and theprincipal object of the invention is to provide a rotary frame containedin a case with ine-ans for rotating the same by a reciprocating handleand provided with means jfor engaging the brush.V

Another object of the invention is to provide means whereby the handleis reciprocated by a movement of the finger or thumb of the user'.V

The invention also consists in certain other features of constructionand in the combination and arrangement of the severalY parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like Ycharacters denote like orcorresponding parts throughout the several views, and in which Y Figurel is a sectional view of the invention.

F ig. 2 is a section on line 2 2 of Fig. 1. Fig. 3 is a section on line3-3 thereof. In these views l indicates the case for containing therotatable frame and at one end the. casing is provided with a reducedpart 2.Y The rotatable frame 3 consists ofthe disks 4L and 5 connectedtogether by the rods 6 which are of square shape in cross section. Thedisk A carries the socket; member 'T which is screw threaded to receivethe screw threaded end of the shaft 8 of the brush 9 so that the brushand shaft may be detached from the frame whenever desired. The. socketmember 7 lies within the reduced end of the case and this reduced end isprovided with an opening to receive the shaft 8. A screw threadedbushing or nut l0 is located in the end Yof the casing and is fiXedlyconnected with the disk 5. A screw threaded shaft 1l passes through saidbushing and at its outer end this shaft carries a handle l2 which isadapted to receive the finger or thumb of the user so that said shaftmay be moved longitudinally through the case. The inner end of the shafthas swiveled thereto a plate 13V which is provided with notches lil: toreceive the rods 6.

lt will thus beV seen that when the shaft ll is reciprocatedthe bushingor nut l() will be rotated so that the frame 3 will be caused to revolvewithiir the case and thus motion will be 'transmitted to the brush.

In either case the brush will be given a rotary movement by thereciprocating movement of the shaft and handle so that the teeth may becleansed with but little effort.

lt is thought from the foregoing description that the advantages andnovel features. of my invention'will be readily-apparent.

I desire it to be understood that I may make changes in the constructionand in the combination and arrangement of the several parts, providedthat such changes fall within the scope ofthe appended claims.

1What l claim is l. A device of the class described compris ing acasing, a rotating frame therein, said Y frame' consisting of a pair ofdisks and rods connecting the disks together, a brush, means forconnecting the same with the frame, a reciprocating rod carried by theshaft, means for causing the reciprocating movement of the shaft torotate the frame and a handle on said shaft.

2. A device of the class described comprising a casing, a rotatableframe therein, aY brush, means for connecting the same with the frame, anut in the case connected with the frame, a screw shaft engaging saidnut and a handle on the shaft. Y

In testimony whereof I afiiX my signature.

GEORGE B. EHRIG,

